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|
Bromine
Chemical Properties & Compounds
| Symbol | Atomic Number | Atomic Weight | Melting Point | Boiling Point | Phase | Density | Classification |
| Br | 35 | 79.904 | -7.3 °C | 58.8 °C | Liquid | 3.1028 g/cm3 | Non-Metal  |
|
|
|
| General |
| Name, Symbol, Number |
bromine, Br, 35 |
| Chemical series |
halogens |
| Group, Period, Block |
17, 4, p |
| Appearance |
gas/liquid: red-brown
solid: metallic cluster
 |
| Standard atomic weight |
79.904(1) g·mol−1 |
| Electron configuration |
[Ar] 4s2 3d10 4p5 |
| Electrons per shell |
2, 8, 18, 7 |
| Physical properties |
| Phase |
liquid |
| Density (near r.t.) |
(Br2, liquid) 3.1028 g·cm−3 |
| Melting point |
265.8 K
(-7.3 °C, 19 °F) |
| Boiling point |
332.0 K
(58.8 °C, 137.8 °F) |
| Critical point |
588 K, 10.34 MPa |
| Heat of fusion |
(Br2) 10.571 kJ·mol−1 |
| Heat of vaporization |
(Br2) 29.96 kJ·mol−1 |
| Heat capacity |
(25 °C) (Br2)
75.69 J·mol−1·K−1 |
Vapor pressure
| P(Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| at T(K) |
185 |
201 |
220 |
244 |
276 |
332 |
|
| Atomic properties |
| Crystal structure |
orthorhombic |
| Oxidation states |
±1, 5
(strongly acidic oxide) |
| Electronegativity |
2.96 (scale Pauling) |
Ionization energies
(more) |
1st: 1139.9 kJ·mol−1 |
| 2nd: 2103 kJ·mol−1 |
| 3rd: 3470 kJ·mol−1 |
| Atomic radius |
115 pm |
| Atomic radius (calc.) |
94 pm |
| Covalent radius |
114 pm |
| Van der Waals radius |
185 pm |
| Miscellaneous |
| Magnetic ordering |
nonmagnetic |
| Electrical resistivity |
(20 °C) 7.8×1010 Ω·m |
| Thermal conductivity |
(300 K) 0.122 W·m−1·K−1 |
| Speed of sound |
(20 °C) ? 206 m/s |
| CAS registry number |
7726-95-6 |
| Selected isotopes |
|
|
| References |
|
Bromine Compounds
|
Source: Wikipedia article Bromine
|
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Chemistry Quick Facts
